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In the last few years, the building industry experienced a significant development as a response to the demographic growth of human society and to the increasing demand for housing. Their construction involves the traditional use of concrete as a material that provides added strength to the finished building. This is manufactured respecting standard recipes depending on the way of its use. Anyway, all concrete recipes involve the use of mineral aggregates extracted from the riverbed, as is happening in Romania, or rock blocks crushing, as reported in other countries. Under these conditions, the rationalization of the use of natural mineral resources and the identification of new possibilities to reduce their consumption through their replacement with vegetal waste has become an important research issue. In this study, two types of vegetal waste—namely, shredded corn cobs and sunflower stalks—were used to manufacture novel ecological concretes. The vegetal wastes, both in untreated and treated forms (with 20% and 40% of sodium silicate solution), were used to replace 50% of the river (mineral) aggregate volume. The obtained concretes were tested, and the values of some important parameters in the concrete characterization (such as bulk density, water adsorption capacity, compressive strength and splitting tensile strength) were compared with the concrete contains cement CEM II/A-LL 42.5R. The obtained results show that these vegetal wastes have the potential to be used in the manufacturing of new ecological concrete. In addition, this alternative material meets the requirements for the sustainable and healthy development of the environment, offering low-polluting solutions in the context of an increasing demand for constructions.
Cătălina Mihaela Grădinaru; Radu Muntean; Adrian Alexandru Șerbănoiu; Vasilică Ciocan; Andrei Burlacu. Sustainable Development of Human Society in Terms of Natural Depleting Resources Preservation Using Natural Renewable Raw Materials in a Novel Ecological Material Production. Sustainability 2020, 12, 2651 .
AMA StyleCătălina Mihaela Grădinaru, Radu Muntean, Adrian Alexandru Șerbănoiu, Vasilică Ciocan, Andrei Burlacu. Sustainable Development of Human Society in Terms of Natural Depleting Resources Preservation Using Natural Renewable Raw Materials in a Novel Ecological Material Production. Sustainability. 2020; 12 (7):2651.
Chicago/Turabian StyleCătălina Mihaela Grădinaru; Radu Muntean; Adrian Alexandru Șerbănoiu; Vasilică Ciocan; Andrei Burlacu. 2020. "Sustainable Development of Human Society in Terms of Natural Depleting Resources Preservation Using Natural Renewable Raw Materials in a Novel Ecological Material Production." Sustainability 12, no. 7: 2651.
This study presents a Computational Fluid Dynamics (CFD) Heat Transfer Analysis for an originally designed Energy Efficient Heat Pipe Heat Exchanger for Waste Heat Recovery in Buildings. The research is focused on developing a heat pipe heat exchanger for domestic hot water and thermal agent preparation, preheating / heating the air from ventilation systems in buildings, using as a primary agent the return of the existing heating system. The proposed device has a lot of advantages as high efficiency for heat recovery, low cost of manufacturing, exploitation and maintenance and it is very easy to install and use.
Andrei Burlacu; Gavril Sosoi; Robert Ștefan Vizitiu; Marinela Bărbuță; Constantin Doru Lăzărescu; Vasilică Ciocan; Adrian Alexandru Șerbănoiu. Energy efficient heat pipe heat exchanger for waste heat recovery in buildings. Procedia Manufacturing 2018, 22, 714 -721.
AMA StyleAndrei Burlacu, Gavril Sosoi, Robert Ștefan Vizitiu, Marinela Bărbuță, Constantin Doru Lăzărescu, Vasilică Ciocan, Adrian Alexandru Șerbănoiu. Energy efficient heat pipe heat exchanger for waste heat recovery in buildings. Procedia Manufacturing. 2018; 22 ():714-721.
Chicago/Turabian StyleAndrei Burlacu; Gavril Sosoi; Robert Ștefan Vizitiu; Marinela Bărbuță; Constantin Doru Lăzărescu; Vasilică Ciocan; Adrian Alexandru Șerbănoiu. 2018. "Energy efficient heat pipe heat exchanger for waste heat recovery in buildings." Procedia Manufacturing 22, no. : 714-721.